COMICS medium-resolution Q-band spectroscopy

The medium-resolution Q-band grating provides a resolution of 2500 (0.66'' slit) and a dispersion of 0.002 um/pixel. The spectrum is dispersed onto all 5 of the COMICS spectrograph's detectors, with large gaps between them. The grating tilt can be selected to vary the wavelength regions which fall on the detectors. At present, only the blue end of the Q-band (16.7-20.7 um) can be observed due to the available blocking filters. Two grating positions are needed to completely cover this region.

The point-source sensitivity of the QM grating varies with wavelengths and is shown in the following figure (1 sigma for 1 second of on-source integration time).